historical-nonfiction:In 1992, a man named Wu Anai, near a Chinese village in Longyou County, based
historical-nonfiction:In 1992, a man named Wu Anai, near a Chinese village in Longyou County, based on a hunch, began to pump water out of a pond in his village. Anai believed the pond was not natural, nor was it infinitely deep as the local lore went, and he decided to prove it. He convinced some of his villagers and together they bought a water pump and began to siphon water out of the pond. After 17 days of pumping, the water level fell enough to reveal the flooded entrance to an ancient, man-made cave!The cave has twenty-four rooms. There are pillars, staircases, and high ceilings over 30 meters (98 ft!) up. The work was done by humans, we know, because they left visible chisel marks in uniform bands of parallel groves. With over 30,000 square meters of space, all meticulously chiseled, this would have been a huge undertaking. Even if people were simply enlarging caves which already existed, it would still have required a lot of manpower working in a coordinated system for a long period of time.Since the project would have been so large, it seems amazing that no record of it exists in China’s extensive written history. But there is not a word. Based on the cave alone, it is estimated to have been completed around 200 BCE, near the Qin Dynasty or Han Dynasties. -- source link
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